Turnbuckle.



A. V. ROE.

TURNBUCKLE.

APPLICATION FILED SEPT. 19. I916.

- 1,2%3,225, Patented 001;. 16,1917;

k F f ALLIOTT VERDON ROE, OF MANCHESTER, ENGLAND.

TURNBUGKLE.

Specification of Letters Patent.

Patented Oct. 16, 1917.

Application filed September 19, 1916. Serial No. 121,018.

The invention relates to the construction of a turnbuckle of the forked type having a nut rotating in its base with an enlarge ment within the fork.

Turnbuckles are used in large numbers on aeroplanes and aerial craft generally, and it is of importance to have one adapted to be manufactured by cheap machine processes. In this invention the fork part of the device may be stamped from sheet material in large quantities and the holes either punched or drilled therein while flat, and preferably the bending into a fork may be done by such means as creates an internally dished form to the base. It is further of great importance to insure that the nut shall be locked and that there is no possibility of the nut unscrewing in aircraft work; this is achieved by providlng for a wire, spring, or other device which secures the nut to the sides of the fork.

In the accompanying drawings, Figure 1 is a plan view showing the development of the strip from which the fork is made;

Figs. 2 and 3 show the nut and eyelet pin respectively I shows the complete turnbuckle; an

Fig. 5 shows a modification thereof; Fig. 6 shows a single locking spring; and Fig. 7 shows a double locking spring.

Referring to the drawings it will be seen that the strip A can be stamped out of a sheet, the holes in the bosses B, C, D being either punched or drilled therein. The strip is then bent into fork shape as shown in Fig. 4 by a step which also depresses or dishes out the base part C, approximately about the dotted line indicated in Fig. 1. This internal'dishing of the base C strengthens the fork and much improves the appearance of the turnbuckle. The threaded nut E is proare provided for the passage of a locking wire, or a spring; this latter being prevented from turning by the sides of the fork A. Either a ferrule such as K, or a pin, passes through the ends of the fork for attaching it to a wire, a framing, another eye pin, or other part.

On reference to Fig. 4 it will be seen that flats F on the nut E enable it to be turned by a spanner while in place in the fork A, thus tightening up the pin 1; by passing a wire M through the holes H, and binding it around one side of the fork A the nut E is securely held from turning, or a lock nut J may be used in special cases. A small spring N passed across two of the holes would answer the same purpose, as shown in Fig. 6,

or a double spring 0 as shown in Fig. 7 may be used. Fig. 5 shows a modified end by providing a pin for attachment to a plate, or the like.

This turnbuckle is quite effective in practice and easy to manipulate, while being inexpensive to manufacture.

Having thus described the nature and ob jects of my invention, what I claim as new and desire to secure by Letters Patent is 1. The combination, in a turnbuckle, of a strip cut out of sheet material with holes therein and having a base and bent into the form of a fork, with a nut having an enlarged end within the fork and a reduced end passing through a hole in the base of the fork, the said reduced end being threaded internally and provided with spanner flats externally, and a threaded eye bolt screwed into the said nut, all substantially as set forth.

2. In a turnbuckle, the combination of a strip cut out of sheet material with holes therein and having a base and bent into the form of a fork, with a threaded nut having an enlarged end within the fork and a reduced end passing through a hole in the base of the fork, the said base being formed of a dished or concave form internally, and an eye bolt threaded within the said nut.

3. In a turnbuckle, the combination of a strip cut out of sheet material with holes thereinand having a base and bent into the form of a fork, with a threaded nut having an enlarged end within the fork and a re-' duced end passing through a hole in the base of the fork, the said base being formed of a dished or ooncaveform internally, means for preventing the turning of the said nut when adjusted, and an eye bolt threaded within the said nut.

- and provided externally with spanner flats, an eye bolt threaded in the said nut, and an enlarged end to the nut within the fork having holes in its sides and having a space between itself and the shank of the eye bolt, substantially as and for the purpose set forth. v

5. The combination in a turnbuckle, of the strip of flat material formed-as a forkwith perforated ends and a perforated base concave internally, an internally threaded nut passing through the concave base, an eye bolt in the said nut, and a cylindrical extension of the said nut within the fork having a space between it, and the eye bolt and having holes in its sides adapted to contain a security Wire or cord, substantially as shown for the purpose specified.

In testimony whereof I affix my signature.

ALLI OTT VERDON ROE. 

